Capturing Race Exercise 4 / Solution

[Diagram]

It's not so easy for Black (White 8 at marked stone)

[Diagram]

Black captures White


Things that don't work so well

[Diagram]

Seki

If Black doesn't prevent White 2, the result will be either a Seki or a Ko.

[Diagram]

Ko

[Diagram]

Another Seki

Moonprince (21k): I'm confused. Why is the one marked 'ko' a ko? Doesn't white have to play elsewhere before playing at the marked stone, and in the meantime, won't black capture the white stones at '2'? (Apologies if I messed anything up, I haven't tried to edit a diagram before.)

P7A77 (10k): It's a ko because white's play elsewhere would threaten something hopefully worth more than what black stands to keep. That's why we call 'em ko threats. :) Black would respond, at which point white could re-take, puting the onus on black to find something worthy of a white response so as not to lose his entire group.


Confused


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